Richard otto



(No Model.) 2 Sheets-Sheet 1.

R OTTO. SEWING MAOEINB.

No. 408,427. Patented Aug. 6, 1889.

N. PETERS, PMXwLHhugn-nphen Washillglolr. D. C.

(No Model.) 2 Sheets-Sheet 2.

R. OTTO.

SEWING MACHINE.

No. 408,427. Patented Aug. 6, 1889.

N. PETERS. PholoLithognpher. Washington 1:. c.

UNITED STATE RICHARD OTTO, OF PLAUEN, SAXONY, GERMANY.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 408,427, dated August6, 1889.

Application filed November 23, 1888. $eria1No. 291,720. (No inodel.)Patented in Germany March 1, 1887, No. 41,227 in England May 11,1887,1I0. 6,926, and in Austria-Hungary November 13, 1887, No. 24,938and No. 50,932.

To aZZ whom it may concern.-

Be it known that I, RICHARD OTTO, of Ilauen, in the Kingdom of Saxony.Germany, have invented a new and Improved Sewing- Machine, (for which Ihave obtained patent in Germany, dated March 1, 1887, No. 41,227;England, dated May 11, 1887, No. 6,926, and Austria-Hungary, datedNovember 13,1887, Nos. 24,938 and 50,932,) of which the following is aspecification.

This invention relates to-a sewing-machine in which, in addition to theordinary needle and shuttle threads, a pair of looper-threads and a pairof chain-threads are employed for making a stitch. The chain-threads arealternately crossed and inter-looped with the looper-threads, of whichone is placed on each side of the fabric. The needle and shuttle threadsserve to complete and bind the stitches.

The invention consists in the various features of construction morefully pointed out in the claim.

In the accompanying drawings, Figure 1 is a side elevation of themachine. Fig. 2 is a top View th'ereof. Figs. 3 to 19 are details ofvarious parts of the machine and of the stitches.

The letter A represents a needle co-operating with a looper or a shuttleA in the ordinary manner.

a a are a pair of loopers having perforat-ions "Z and oscillating inhorizontal planes 011 both sides of the work-plate.

The loopers a a are set in motion from shaft B by means of cam B, leverE, and connecting-rod F.

g g are the guides for the chain-threads, that are alternately raisedand lowered, so that the chain-threads h cross at each stitch.Thelooper-threads Z Z, placed, respectively, on the top and bottom ofthe fabric, Fig. 15, pass through these crosses. -The guides g g arepoint-ed and receive their up-and-down motion by levers D f, operated bycam e.

(Z are rails secured to guides g g and sliding in ways on themachine-head, so as to guide the parts g g in their motion.

G G are the spools that hold the looperthreads Z Z, such threads goingto the loopers a a.

H H are the spools that hold the chainthreads h.

J is the spool for the needle-thread, while the shuttle has its ownspool.

In Fig. l the spools H H and G G are U placed back of each other forgreater clearness.

When the needle A descends, Figs. 6 and 7, the loopers a a are withtheir threads in their extreme positions behind the needle. On thereturn motion of the loopers, the threads Z Z remain suspended behindthe needle, Fig. 9. In this position the loopers a a have passed theirthreads through the cross formed by the chain-threads h of the guides gg. The guides g g now change their position-that is, the guide g ascendsand the guide g descends, Fig. 10. The cross thus produced locks thelo0per-threads Z Z. During the same time the needle ascends and inconjunction with the shuttle-thread sews the two looper-threads Z Ztightly against both sides of the fabric. The loopers now resume theirmost extreme position behind the needle, while the needle assumes itsmost elevated position, and the fabric is fed forward. The needle A nowmakes the next descent and again retains the threads Z Z brought by theloopers behind the stitch-hole to be formed, Figs. 12 and 13. Theloopers a a pass forward through the cross, the chain-thread guideschange positions, and the needle sews the looper-t-hreads down, so thata series of loops is formed, as shown in Figs. 14 to 16.

If heavy cords are to be Worked in, the two guides g g are replaced bybut one guide, which alternately ascends and descends. This produces thelooping of a chain-thread k around the looper-threads Z Z, as shown inFig. 18. Fig. 19 shows a stitch made by a double motion of the guides gg during each full motion of the needle.

My improved construction can be applied to any system of sewing-machinesThat I claim is- The combination, with a sewing-machine having needleand shuttle, of the horizontallyoscillating loopers a a, the one aboveand the other below the Work-plate, and with a vertically andindependently reciprocating tln'ead-carrying guide g, substantially asspecified.

In testimony whereof I have sign ed my name to this specification in thepresence of two subscribing Witnesses.

RICHARD OTTO.

\Vitnesses:

HERM. VIERTEE, MORITZ OTTO.

